Valve of compressed-gas containers



Feb. 13, 1923. 1,444,780

R. H. DAVIS VALVE OF COMPRESSED GAS CONTAINERS Filed Sept. 5, 1921 Patented Feb, 13,

ENQTEQ 5:3 iii" TATEd ROBERT HENRY DAVIS, or LONDON, nnenenn."

VALVE OF COMPRESSED-GAS CONTAINER-S.

Application filed September 3 1921. Serial No. 498,36 l.

To all whom, it may concern:

Be it known that I, Ronnirr l-lnnnr 1)AVIS, a subject of the King of Great Britain, residing at 187, lVestminster Bridge Road, London, England, have invented new and useful lniproven'ients in 01' Connected with the Valves of Compressed Gas Containers,

of which the following is a specification.

This invention relates to the valves of compressed gas containers such as the main controlling valves of oxygen cylinders as used in connection with the breathing apparatus employed for mine rescue and other purposes. The invention consists broadly in the provision of means for locking the said valves, against accidental displacement, in any position to which they may be adjusted.

According to one embodiment of the invention the valve hand-wheel is form ed with a number of holes arranged around the circumference ot a circle concentric with the axis of the said wheel and with any one of which, depending upon the position to which the wheel has been adjusted, there can engage a bolt mounted in the valve casing beneath the said wheel. The bolt is retained in a guide in which it can slide axially in a direction, parallel to the axis of the valve spindle and it is furnished with a spring which normally tends to hold it in engagement with the handwhcel, with a finger-piece by means of which it can be disengaged ilroln the said wheel and with means by which it can be retained in the operative position.

To enable the invention to be fully understood, I will describe it by reference to the accompanying drawing, in which Figure 1 is an elevation, partly in section ot a con'rpletc valve having the locking dcvice app ed thereto,

I 2 a plan view thereof. and

5% is oh elevation of the alve angles to El .1115 1.

(4 indicates the ialve casingand Z the valve hand-wheelv 0 indicates the series of holes formed in the said hand-wheel and arranged around the circumference of a circle concentric with the valve spindle axis, as shewn in Figure 2. (Z is the locking bolt. which is mounted in the guide 6 preferably "Formed integral with the valve casing a. The bolt (Z is provided, at that part which is within the guide e, with a shoulder or collar and agents-t the underside this collar there bears one end of a spiral spring 9, which is coiledaround the bolt and the other end of which contacts with the bottom of the guide 6.

The bolt (Z extends completely through the guide 6 and its lower projecting end is provided with the linger-piece h, which, when the bolt is in the locking position, enters a slot 2' in the lower part of the guide 0, as shewn in Figure 1. When the bolt is withdrawn from engagement with the handwheel. 6 the finger-piece is free from the slot i and can be turned into' the position shewn in Figure 3 in whichit bears against the underside of the guide 6 and thus secures the locking bolt cl in the inoperative posi tion.

As will be understood, the device operates as "follows: Assuming that the bolt is in the disengaged position shewn in Figure 3, the hand-wheel Z) is adjusted to the required position in which one of the holes a is in axial alignment with the bolt (Z. is then turned by means of the fingenpiece it until the latter can enter the slot 2' in the guide 6, and the bolt pushed into engagement in the aforesaid hole 0 in which it is retained by the spiral spring g, thereby securely locking the hand-wheel against'accidental displacement as shewn in Figures 1 and 2. To release the hand-wheel to permit ot the :t'urthcr adjustment of the valve it is merely necessary to pull down the bolt 0 by means of the finger-piece 72 and to turn the latter into the position shown in F igure 3.

The latter The bolt cl may be locked in its upper position by turning the finger-piece it into engagement with a notch j in the guide 6.

Claims:

1,. In a valve, the combination with the valve ca ing, and valve hand wheel, of spring actuated loclri bolt, slidably mounted on one of said parts, the other of said parts being provided with curved row of apertures arranged concentrically with respect to the axis of the hand wheel to receive said. bolt, a finger. piece for movsaid bolt longitudinally, and a shoulder adapted to be engaged by thefinger piece to hold the bolt at one extreme of move ment.

2. In a valve, the combination with the valve casing, and valve hand wheel, of a spring actuated locking bolt, slidably mounted on one of said parts, the other of said parts being provided with a eurved ro W of apertures arranged eoneentrzeally with respect to the axis of the hand Wheel to receive said bolt, a finger piece for moving said oolt longitudinally and shoulders in position to engage said finger piece When the bolt is rotated, to look the bolt in inoperative and in operative position.

The combination With a valve having a hand wheel provided with a series of holes 0i a spring bolt slid-ably mounted in a guide on the valve oaslng and adapted to engage any one of said series of holes in the valve hand-Wheel and of means such as a fingerpiece for manipulating the said bolt and locking it in the operative position, substan tially as hereinbefore described.

ROBERT IEENRY DAVIS. 

